Power system energy accumulation optimizing method

Abstract

The invention discloses a power system energy accumulation optimizing method. The method is characterized in that during energy accumulation of a power system, a first-category energy accumulation system and a second-category energy accumulation system are operated in a combined manner, and a power system mathematic model comprising the first-category energy accumulation system and the second-category energy accumulation system is configured and applied to the power system. By the method, the energy accumulation of the power system has the large-capacity energy accumulation performance of the first-category energy accumulation system and the timely dynamic response performance of the second-category energy accumulation system, the problems that the power system is poor in dynamic responds performance when only the first-category energy accumulation system is configured in the power system and the power system is small in energy accumulation capacity when only the second-category energy accumulation system is configured in the power system are solved, the operation efficiency of the power system is increased, and dispatching cost is saved.

Description

technical field [0001] The invention relates to the field of electric power systems, in particular to an energy storage optimization method for electric power systems. Background technique [0002] Wind power resources are clean and renewable, but at the same time, the output of wind power resources fluctuates violently and has low dispatchability. In the power system, on the one hand, the wind power generated by wind farms is encouraged to be fully connected to the grid to reduce the total dispatch cost and maximize environmental benefits; will greatly reduce its operating efficiency. Due to its good dynamic characteristics and conversion efficiency, the energy storage system is introduced into the power system, and operates in conjunction with wind farms and thermal power units to improve operating efficiency, save scheduling costs and maximize environmental benefits. [0003] At present, various forms of energy storage systems can be successfully applied in power system...

AI Technical Summary

Problems solved by technology

[0004] Type I energy storage system has a large capacity and strong static adjustment ability, but the dynamic response is slow

The actual measurement data of the wind farm shows that the wind output can change drastically within 5 minutes, so a Class I energy storage system alone in the power system cannot respond to the rapid change of wind power in a short period of time; the dynamics of the Class II energy storage system The response is relatively fast, and it has strong dynamic tracking ability, but the energy storage capacity is relatively small, and the overall adjustment ability is limited

Due to the characteristics of Class I energy storage systems or Class II energy storage systems, when Class I energy storage systems or Class II energy storage systems are configured separately in the power system, the coordinated operation effect with wind farms and thermal power units will not be affected and cannot be improved. Power system operating efficiency and dispatch cost saving

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